MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 83b3d86539fd63f97b860e86c3e61b4e2c64dc1ff2936566d5bda292ab6e478d. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.

Database Entry


Formbook


Vendor detections: 14


Intelligence 14 IOCs YARA 4 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 83b3d86539fd63f97b860e86c3e61b4e2c64dc1ff2936566d5bda292ab6e478d
SHA3-384 hash: 8376f7298cbd6853cfe3bd3f51e23a47d38736ee2c426009a25d080f4ee099d90d7047f67e0123a9c9838d6e8ad2ba1f
SHA1 hash: 09e4feef7b72c18b90b589f0d3f7f4fccba1664c
MD5 hash: a59ac7b2bcf00d4d15a9a010d56139b0
humanhash: stairway-angel-utah-grey
File name:pfr 80954820021.exe
Download: download sample
Signature Formbook
Create hunting rule
File size:718'848 bytes
First seen:2021-09-08 18:17:19 UTC
Last seen:2021-09-09 05:54:03 UTC
File type:Executable exe
MIME type:application/x-dosexec
imphash f34d5f2d4577ed6d9ceec516c1f5a744 (48'665 x AgentTesla, 19'479 x Formbook, 12'208 x SnakeKeylogger)
ssdeep 12288:04Ri2wdKydsQrXlWwYaAwmOPWEvl4lVShf:Y2QzsSlWFymA9j9
Threatray 9'130 similar samples on MalwareBazaar
TLSH T17CE42C3E59FE2327D176C6E5CBE08823F6D098AF3133A96567D747264306A4674C322E
Reporter GovCERT_CH
Tags:exe FormBook

Intelligence

File Origin
# of uploads :
4
# of downloads :
274
Origin country :
n/a
Vendor Threat Intelligence
Malware family:
n/a
ID:
1
File name:
pfr 80954820021.exe
Verdict:
Malicious activity
Analysis date:
2021-09-08 18:19:04 UTC
Tags:
trojan formbook stealer
Link:
https://app.any.run/tasks/7a0cd38f-8325-4623-8f04-a8f77383e370

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Formbook
Create hunting rule
Link:
https://www.capesandbox.com/analysis/186438/
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a window
Sending a UDP request
Sending a custom TCP request
Unauthorized injection to a recently created process
Creating a file
Launching a process
Launching cmd.exe command interpreter
Setting browser functions hooks
Unauthorized injection to a system process
Malware family:
Formbook
Create hunting rule
Verdict:
Malicious
Link:
https://analyze.intezer.com/analyses/210862ca-0fc6-476e-848f-5f038a17a4ff
Result
Threat name:
FormBook
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
100 / 100
Link:
https://www.joesandbox.com/analysis/847645
Signature
.NET source code contains potential unpacker
.NET source code contains very large strings
C2 URLs / IPs found in malware configuration
Found malware configuration
Injects a PE file into a foreign processes
Malicious sample detected (through community Yara rule)
Maps a DLL or memory area into another process
Modifies the context of a thread in another process (thread injection)
Modifies the prolog of user mode functions (user mode inline hooks)
Queues an APC in another process (thread injection)
Sample uses process hollowing technique
Self deletion via cmd delete
System process connects to network (likely due to code injection or exploit)
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Tries to detect virtualization through RDTSC time measurements
Uses ipconfig to lookup or modify the Windows network settings
Yara detected AntiVM3
Yara detected FormBook
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 signatures2 2 Behavior Graph ID: 480076 Sample: pfr 80954820021.exe Startdate: 08/09/2021 Architecture: WINDOWS Score: 100 37 Found malware configuration 2->37 39 Malicious sample detected (through community Yara rule) 2->39 41 Yara detected AntiVM3 2->41 43 7 other signatures 2->43 10 pfr 80954820021.exe 3 2->10         started        process3 signatures4 53 Injects a PE file into a foreign processes 10->53 13 pfr 80954820021.exe 10->13         started        process5 signatures6 55 Modifies the context of a thread in another process (thread injection) 13->55 57 Maps a DLL or memory area into another process 13->57 59 Sample uses process hollowing technique 13->59 61 Queues an APC in another process (thread injection) 13->61 16 explorer.exe 13->16 injected process7 dnsIp8 27 www.barry-associates.com 16->27 29 www.anhhoangnhatle.com 16->29 31 2 other IPs or domains 16->31 33 System process connects to network (likely due to code injection or exploit) 16->33 35 Uses ipconfig to lookup or modify the Windows network settings 16->35 20 ipconfig.exe 16->20         started        signatures9 process10 signatures11 45 Self deletion via cmd delete 20->45 47 Modifies the context of a thread in another process (thread injection) 20->47 49 Maps a DLL or memory area into another process 20->49 51 Tries to detect virtualization through RDTSC time measurements 20->51 23 cmd.exe 1 20->23         started        process12 process13 25 conhost.exe 23->25         started       
Detection:
formbook
Create hunting rule
Link:
https://mwdb.cert.pl/sample/83b3d86539fd63f97b860e86c3e61b4e2c64dc1ff2936566d5bda292ab6e478d/
Threat name:
ByteCode-MSIL.Trojan.AgentTesla
Create hunting rule
Status:
Malicious
First seen:
2021-09-08 17:20:12 UTC
File Type:
PE (.Net Exe)
Extracted files:
6
AV detection:
14 of 46 (30.43%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=qoz5qzjz7vr7s64gb2dmhzq3jywgjxa76kjwkzwvxwrjfk3oi6gq._file
Verdict:
malicious
Label(s):
formbook
Create hunting rule
Similar samples:
3f2cdc7783014a37d7ad61ee00c226d5221d4932f4113eb3590a9c9d0447b461
Formbook
4d2ca668cdde851a6389ee4d0fb089d3e125e2d951dbd7201767174ecafa66ad
Formbook
50ef55dfb72ff4f84955243ea50f9fecbadbe9c4fb9cbe3078771e949b2ab589
Formbook
5313ca84959a3d88973ad5b85acc66e268c3e8874d5d6f21fcd4a4c1a7628496
Formbook
5fc1f737492b4a7e01b1e2befa4e25b1a65c7a6a83b4ec419660d0c3c4894300
Formbook
66e06710b095c687448e0b08240a99f84dfbfc24882a2c8c9f5b165f58469d8f
Formbook
6c8b4de0f39caa11127409b3ee06f410b0c5642b840f10822ad40af5745690cb
Formbook
78b11874a66b80ec78962b27c352a643d1a11c7f5cf9273f0db06df3f4f7e76c
Formbook
78f83f782f8d2077dd50d65badb4ed36ec24c029241287f76560e60733b61c29
Formbook
d040f18bcf1d59a6372cdd74ec22ba8908ca7c6e7c5a01e80053433277e16d1d
Formbook
+ 9'120 additional samples on MalwareBazaar
Result
Malware family:
formbook
Create hunting rule
Score:
  10/10
Tags:
family:formbook campaign:ergs rat spyware stealer trojan
Link:
https://tria.ge/reports/210908-wxmpsaehd9/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: GetForegroundWindowSpam
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of UnmapMainImage
Suspicious use of WriteProcessMemory
Suspicious use of SetThreadContext
Deletes itself
Formbook Payload
Formbook
Malware Config
C2 Extraction:
http://www.barry-associates.com/ergs/
Unpacked files
SH256 hash:
17d16777fd0f96776c3872efffe4afc4fa22be1bc72c6bb1c10de63922c63a5b
MD5 hash:
0b2a299e0cc6747fdb6835a8a038e0a7
SHA1 hash:
13f6911d65a5b9e6641bdbf7e2ce6eab5a74c157
Detections:
win_formbook_g0
Create hunting rule
win_formbook_auto
Create hunting rule
Link:
https://www.unpac.me/results/b0056369-bb9f-48df-8fd3-8756bd95142a/
Parent samples :
83b3d86539fd63f97b860e86c3e61b4e2c64dc1ff2936566d5bda292ab6e478d
6a778cbfb34a637265c39ae5a0a321010998d93fb7183b4e8766a4a2390bf72f
0cdbab37f443dbdc7fb7aecc5e0b8dfb7b25b7d665397194bb8a137e9b01d44f
85b8983f0d67758fd02b1aa875add6fd3fe6e88f9ade27cb535c490a0c367491
69394a249833f97289151fa8334f32e0b0467ce4ecb164b0706784fb836136a6
SH256 hash:
c0ee1071e444f415f8b62856a0896f3b22e563f1bb4f03d14142583efe49a565
MD5 hash:
29db2e114b88ae1f6a00c9aa71690043
SHA1 hash:
ec82db71443556a5b320357b0b8b09e70ec1db9c
Link:
https://www.unpac.me/results/b0056369-bb9f-48df-8fd3-8756bd95142a/
SH256 hash:
78096adaa09c64e173989ecc6b8628ec0a269d2d9460991971eda12c60161da5
MD5 hash:
ee61bb4c0752b10df5d29fd84787d4d3
SHA1 hash:
de1971f8736a4b27ea9fe3725c54fefb5c32a3f5
Link:
https://www.unpac.me/results/b0056369-bb9f-48df-8fd3-8756bd95142a/
SH256 hash:
83b3d86539fd63f97b860e86c3e61b4e2c64dc1ff2936566d5bda292ab6e478d
MD5 hash:
a59ac7b2bcf00d4d15a9a010d56139b0
SHA1 hash:
09e4feef7b72c18b90b589f0d3f7f4fccba1664c
Link:
https://www.unpac.me/results/b0056369-bb9f-48df-8fd3-8756bd95142a/
Malware family:
FormBook
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/83b3d86539fd/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Formbook
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/83b3d86539fd63f97b860e86c3e61b4e2c64dc1ff2936566d5bda292ab6e478d

YARA Signatures

MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.

Rule name:INDICATOR_SUSPICIOUS_Stomped_PECompilation_Timestamp_InTheFuture
Create hunting rule
Author:ditekSHen
Description:Detect executables with stomped PE compilation timestamp that is greater than local current time
Rule name:pe_imphash
Create hunting rule
Rule name:pe_imphash
Create hunting rule
Rule name:Skystars_Malware_Imphash
Create hunting rule
Author:Skystars LightDefender
Description:imphash

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

Formbook

Executable exe 83b3d86539fd63f97b860e86c3e61b4e2c64dc1ff2936566d5bda292ab6e478d

(this sample)

  
Dropped by
formbook
  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/186438/

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